JP2002227334A - Curtain wall support member and its mounting method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a curtain wall and its mounting method that can simplify various field works near the outermost peripheral edge of a building and improve the safety of work. SOLUTION: This curtain wall support member arranged on the outer periphery of the building and mounted with a curtain wall 4 is provided with a precast concrete body 8 integrally formed with a beam 6 and a floor part 7 on the beam 6; angle assemblies 9 provided projecting from the concrete body 8 and jointed to cantilevers 3a; joint reinforcements 10 provided projecting from the concrete body and embedded in slab concrete; and hardware 11 provided at the concrete body 8 to mount the curtain wall 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a curtain wall support member capable of simplifying various on-site work near the outermost periphery of a building and improving work safety, and a method of mounting the same. .

[0002]

2. Description of the Related Art Conventionally, when an exterior curtain wall is attached to an office building or the like, as shown in FIG. A steel beam c is hung along the outer periphery of the building a perpendicular to the beam and joined, and a hardware e for supporting the curtain wall d is attached to the beam c.

When the slab f is constructed on the site after the steel work such as the large beams b and the small beams c, the outermost peripheral edge of the building a is located on the large beams b and the small beams c from the inside of the building a. A deck plate is laid down to the position of the small beam c, and a dam plate for blocking the slab concrete to be poured is attached near the small beam c which is the outermost peripheral position of the building a. A stud bolt was driven into the beam c, slab reinforcement was installed on the deck plate, and then slab concrete was driven.

[0004] In addition, after the girders b and the small beams c made of steel are attached, fireproof coating work (indicated by g in the figure) is required.

[0005]

By the way, in the prior art, since the small beam c to which the curtain wall d is attached is made of steel, the refractory coating work has to be performed as described above.

In particular, when the curtain wall d is made of metal, the fireproof coating g must be applied to the small beam c before the curtain wall d is attached to the small beam c. At this time, since the curtain wall d has not been attached yet, the fireproof coating construction site is exposed to the outside, so that the fireproof coating material must be cured so as not to be scattered to the outside, A working scaffold had to be prepared for this curing. In particular, since the small beam c is provided at the outermost peripheral position of the building a, the installation work of the scaffold and the curing work using the scaffold are dangerous work. In addition, since the fire-resistant coating application site is exposed to the outside, the fire-resistant coating material may peel off and fall due to rainfall or the like.

In addition, the above-mentioned fire-resistant coating work on the small beam c and the installation of the small beam c between the leading ends of the large beams b are upward work from inside the building a at the outermost peripheral position of the building a. As shown in the figure, since the large beam h along the outer periphery of the building a also exists close to the inside of the small beam c, the work is performed in a narrow space. The installation work of the beam c and the fireproof coating work were extremely complicated.

Further, the construction work of the slab f described above
At the position of the small beam c, which is the outermost peripheral edge of the building a, deck plates, weir plates, and stud bolts must be handled, slab arrangements must be made, and slab concrete must also be cast. There were also safety issues.

Therefore, the present invention has been made in view of the above-mentioned conventional problems, and can simplify various site works near the outermost peripheral edge of a building, thereby improving work safety. It is an object of the present invention to provide a curtain wall support member and a method for mounting the same.

[0010]

According to the present invention, there is provided a curtain wall support member according to the present invention, wherein the beam portion and the beam portion are provided on a curtain wall support member which is disposed on an outer periphery of a building and to which the curtain wall is attached. A precast concrete body integrally formed with a floor on a beam, a joining material provided to project from the concrete body and joined to a support beam, and a slab provided to project from the concrete body and It is characterized by comprising a joint reinforcing bar buried in concrete, and hardware provided on the concrete body for attaching the curtain wall.

In the method for mounting a curtain wall support member according to the present invention, the curtain wall support member is joined to a support beam by arranging the curtain wall support member on an outer periphery of a building, and then the curtain wall support member is attached. In this method, slab concrete is cast on the inner side of the building so as to embed the reinforcing bar, and the curtain wall support member is integrally joined to the slab.

[0012]

Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. A schematic configuration of a curtain wall support member according to the present embodiment is shown in FIG. 1, and details thereof are shown in FIGS. 2 to 5. In the illustrated example, building 1
Is formed by joining together a large number of steel pipe columns 2 and a large number of H-beams 3 formed of a large number of H-shaped steels that connect the steel pipe columns 2 in multiple stages in the height direction and vertically and horizontally in a horizontal plane. I have. The cantilever beam 3 as a support beam is projected from the steel pipe column 2 outward from the building 1.
The cantilever 3a is disposed so as to reach the outermost peripheral position of the building 1, and the cantilever 3a is spaced apart along the height direction of the building 1 when viewed from the outside of the building 1. And are arranged in a grid pattern at intervals along the outer circumferential direction of the building 1. The frame of the building 1 is not limited to a steel structure, but may be any structural type such as a reinforced concrete structure.

Between the cantilever beams 3a arranged in a grid pattern, a curtain wall support member 5 for horizontally extending along the outer peripheral direction of the building 1 and attaching a curtain wall 4 for exterior is provided. The curtain wall supporting member 5 occupies the outermost peripheral position of the building 1.

The curtain wall support member 5 serves as a beam portion reaching between the adjacent cantilever beams 3a, a small beam 6 having a smaller external dimension than the large beam 3, and on the small beam 6, the Floor 7 to be located on the outer peripheral edge
Precast concrete body 8 integrally formed with
And an angle assembly 9 as a joining material, which is provided so as to protrude outward from the concrete body 8 in the horizontal direction and is joined to the cantilever 3a, and protrudes outward from the concrete body 8 in the horizontal direction. And a metal fitting 11 provided on the concrete body 8 for attaching the curtain wall 4.

The floor 7 of the precast concrete body 8
Is formed along the outer circumferential direction of the building 1 so as to be bridged between the cantilever beams 3a, and is formed to be narrower in the inner and outer directions of the building 1, and the small beam 6 is formed substantially in the center of the floor 7 in the width direction. Building 1
It is formed along the outer peripheral direction. The concrete body 8 is made of reinforced concrete, in which a reinforcing bar set 14 composed of various reinforcing bars such as a beam reinforcing bar 12 and a stirrup bar 13 is buried from the small beam 6 to the floor portion 7.
It is manufactured in factories and the like.

An angle assembly 9 is provided at each longitudinal end of the precast concrete body 8. These angle assemblies 9 are constituted by a pair of L-shaped angle members 15 and 16.

Specifically, the angle assembly 9 overlaps one side surface of the other angle member 16 with the other side surface which is raised by lowering one side surface of one angle member 15, By this overlapping, the other side surface of the angle member 16 is assembled to one side surface of one of the angle members 15 so as to be opposed to each other at an interval in the up-down direction, and the overlapped portions are welded to each other.
Are integrally joined. Further, the pair of angle members 15 and 16 are overlapped while being slightly shifted in the longitudinal direction, and the other angle member 16 is formed to be longer than one angle member 15.

One end of each of the angle assemblies 9 thus constructed is embedded only in the vicinity of the longitudinal end of the precast concrete body 8, while the other end is disposed in the longitudinal end of the concrete body 8. The end of one of the angle members 15 is aligned with the longitudinal end of the floor 7 and the other angle member 16 is
It extends so as to reach above the upper flange 3b of the cantilever beam 3a made of a mold steel. Note that, instead of the angle assembly 9, a U-shaped channel material whose lower part is partially cut away may be used as the joining material.

As shown in FIG. 6, a pair of right and left angle assemblies 9 projecting from a pair of precast concrete bodies 8 adjacent to each other with the cantilever beam 3a interposed therebetween are locked on the upper flange 3b of the cantilever beam 3a. The other angle member 16 is fastened by bolts and nuts 18 to a flat plate-shaped bracket 17 erected by welding and fixed on the upper flange 3b, whereby a pair of left and right concrete bodies 8 is placed. Are collectively joined to the cantilever beam 3a. These angle assemblies 9 may be further connected to the bracket 17 by welding. In the figure, 19 is a washer.

On the other hand, on the floor 7 of the precast concrete body 8, a joint reinforcing bar 10 is provided on the inner side facing the inside of the building 1 so as to protrude at appropriate intervals in the outer peripheral direction of the building 1. This joint reinforcing bar 10 has a concrete body 8 at the base end.
A U-shaped tip portion 10a buried inside and protrudes from the inner surface. Since the angle assembly 9 is mounted on the upper flange 3b of the cantilever 3a, the floor 7 is set at an upper end position higher than that of the girder 3 or the cantilever 3a. Inside,
A recess 20 for placing slab concrete is formed.

Accordingly, the precast concrete body 8 disposed at the outermost peripheral position of the building 1 exhibits a function of blocking the slab concrete to be cast, and
At this time, the joint reinforcement 10 is embedded in the slab concrete, whereby the slab 21 and the curtain wall support member 5 are integrated.

A mortar for finishing the floor is further provided on the floor 7 of the slab 21 and the precast concrete body 8, and the symbol "FL" shown in the figure is used.
Indicates the floor level after the floor finishing mortar construction. Furthermore, a gap δ on the cantilever 3a between the concrete bodies 8
In order to stop the slab concrete flowing onto the upper flange 3b of the cantilever 3a, a small dam plate (not shown) is separately provided.

Further, a precast concrete body 8
The floor 7 has an outer surface opposite to the inner surface from which the joining rebar 10 protrudes, and is appropriately spaced in the outer circumferential direction of the building 1.
A hardware 11 having a general configuration for attaching the curtain wall 4 is provided. The curtain wall 4 is attached to and supported by the curtain wall support member 5 via these hardwares 11, so that the outer periphery of the building 1 is exteriorly finished with the curtain wall 4. Note that in the figure, 22
Is a refractory coating applied to the girder 3 and the cantilever 3a.

The curtain wall supporting member 5 mainly composed of such a precast concrete body 8 is attached to the building 1 according to the following procedure.

First, the curtain wall support member 5 having the above-described configuration is manufactured in a factory or the like, and is lifted between cantilever beams 3a to be construction sites at the site. The lifted curtain wall support member 5 is provided with an angle assembly 9 protruding from both ends of the curtain wall support member 5 and an upper flange 3b of the cantilever beam 3a.
By mounting on the top in a locked state, it is bridged between a pair of cantilever beams 3a adjacent to each other in the outer peripheral direction of the building 1, and then the angle assembly 9 is joined to the bracket 17 of the cantilever beam 3a. By doing so, it is joined to these cantilever beams 3a. By performing such an operation around the building 1, the curtain wall support members 5 are arranged on the outer periphery of the building 1.

When the operation of attaching the curtain wall support member 5 to the cantilever beam 3a is completed in this manner, the curtain wall support member 5 is inserted into the recess 20 defined on the inner side of the building 1 by the floor 7 of the curtain wall support member 5. On the other hand, slab construction work is performed.

In this slab construction work, the deck plate is laid in the recess 20, stud bolts are installed on the girder 3, etc., and the slab reinforcement is installed on the deck plate. Is completed by casting. At this time, the slab concrete is dammed by the inner surface of the floor 7 of the curtain wall support member 5 and the dam plate in the gap δ described above. Then, by casting the slab concrete in this manner, the joining reinforcing bar 10 of the curtain wall support member 5 is buried in the slab concrete, whereby the curtain wall support member 5 is integrally joined to the slab 21. become.

When the joining work between the curtain wall support member 5 and the slab 21 is completed in this way, the exterior finish of the building 1 can be finished by attaching the curtain wall 4 to the hardware 11 of the curtain wall support member 5. Completed.

According to the curtain wall support member 5 and the method of mounting the same according to the present embodiment described above,
Since the curtain wall support member 5 is formed mainly of the precast concrete body 8 integrally provided with the small beams 6, the fireproof covering work can be omitted, and various conventional problems associated with the fireproof covering work can be omitted. Can be solved all at once.

The curtain wall support member 5 including the small beam 6 is installed by lifting the angle assembly 9 on the cantilever beam 3a from above, and joins the angle assembly 9 and the bracket 17 together. The joining to the cantilever beam 3a can be completed only by the
Even if the girder 3 along the outer peripheral direction of the above is disposed close to the girder 3, the girder 3 is located below the installation work position of the curtain wall support member 5 and does not become an obstacle (see FIG. 1). The installation and mounting work can be greatly facilitated.

In the construction work of the slab 21,
The curtain wall support member 5 including the floor 7 is already installed at the outermost peripheral position of the building 1, and the slab 21 is constructed by various operations on the inner side of the building 1 relative to the curtain wall support member 5. Therefore, work near the outermost peripheral edge of the building 1 can be reduced, and work safety can be improved. In this case, since the curtain wall support member 5 installed at the outermost peripheral position of the building 1 is made of precast concrete, it can be used as a safe work passage thereover.

Further, the curtain wall supporting member 5 is
Since it is not made of cast-in-place concrete at the place of installation but made of precast concrete manufactured in a factory or the like, it is possible to secure a high mounting position accuracy of the hardware 11 and the like to be provided on the concrete, and to provide a curtain wall on site. 4 can improve the efficiency of the mounting operation.

Since the curtain wall support member 5 is made of precast concrete, even if the outer peripheral form of the building 1 has a complicated shape, it is possible to easily manufacture and supply a product conforming to the complicated shape.

[0034]

As described above, in the curtain wall support member and the method of attaching the same according to the present invention, the fireproof covering work can be omitted, and the various problems associated with the fireproof covering work at a glance are all at once. The installation and installation work to be performed at the outer peripheral edge of the building can be greatly facilitated, and the slab construction work also requires work near the outermost peripheral edge of the building. Therefore, various site works near the outermost peripheral edge of the building can be simplified, and the safety of the work can be improved.

[Brief description of the drawings]

FIG. 1 is a side sectional view showing a schematic configuration of an embodiment of a curtain wall support member according to the present invention.

FIG. 2 is a plan view showing an arrangement state of a curtain wall support member of FIG.

FIG. 3 is an enlarged plan view of a main part of FIG. 2;

FIG. 4 is a sectional view taken along line AA of FIG. 3;

FIG. 5 is a sectional view taken along line BB in FIG. 3;

FIG. 6 is an enlarged view of a main part of FIG. 5;

FIG. 7 is a side sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Building 3 Large beam 3a Cantilever beam 4 Curtain wall 6 Small beam 7 Floor 8 Precast concrete body 9 Angle assembly 10 Joint reinforcing bar 11 Hardware 21 Slab

 ────────────────────────────────────────────────── ─── Continued on the front page (72) Inventor Yukihiro Kanzaka 2-15-2 Konan, Minato-ku, Tokyo Obayashi Corporation Tokyo head office F-term (reference) 2E002 NA01 NB01 NC01 PA04 PA09 RA03 RB01

Claims (2)

[Claims] 1. A curtain wall support member which is arranged on the outer periphery of a building and to which a curtain wall is attached, wherein: a precast concrete body integrally formed with a beam and a floor on the beam; A joining material that is provided to protrude and is joined to the support beam; a joining rebar that is provided to protrude from the concrete body and is buried in slab concrete; and a joining bar that is provided in the concrete body and attaches the curtain wall. A curtain wall support member, comprising: 2. The curtain wall support member according to claim 1, wherein the joining material is joined to a support beam and arranged on the outer periphery of the building, and then the joint reinforcement is buried inside the building with respect to the curtain wall support member. Characterized in that the slab concrete is cast in such a manner that the curtain wall support member is integrally joined to the slab.